Search results for "EFF"

Intergenerational fitness effects of the early life environment in a wild rodent

2019

The early life environment can have profound, long‐lasting effects on an individual's fitness. For example, early life quality might (a) positively associate with fitness (a silver spoon effect), (b) stimulate a predictive adaptive response (by adjusting the phenotype to the quality of the environment to maximize fitness) or (c) be obscured by subsequent plasticity. Potentially, the effects of the early life environment can persist beyond one generation, though the intergenerational plasticity on fitness traits of a subsequent generation is unclear. To study both intra‐ and intergenerational effects of the early life environment, we exposed a first generation of bank voles to two early life…

Population divergence in maternal investment and embryo energy use and allocation suggests adaptive responses to cool climates

2023

1. The thermal sensitivity of early life stages can play a fundamental role in constraining species distributions. For egg-laying ectotherms, cool temperatures often extend development time and exacerbate developmental energy cost. Despite these costs, egg laying is still observed at high latitudes and altitudes. How embryos overcome the developmental constraints posed by cool climates is crucial knowledge for explaining the persistence of oviparous species in such environments and for understanding thermal adaptation more broadly. 2. Here, we studied maternal investment and embryo energy use and allocation in wall lizards spanning altitudinal regions, as potential mechanisms that enable su…

Early life of fathers affects offspring fitness in a wild rodent

2019

Intergenerational fitness effects on offspring due to the early life of the parent are well studied from the standpoint of the maternal environment, but intergenerational effects owing to the paternal early life environment are often overlooked. Nonetheless, recent laboratory studies in mammals and ecologically relevant studies in invertebrates predict that paternal effects can have a major impact on the offspring's phenotype. These non‐genetic, environment‐dependent paternal effects provide a mechanism for fathers to transmit environmental information to their offspring, and could allow rapid adaptation. We used the bank vole Myodes glareolus, a wild rodent species with no paternal care, t…

Implications of heat waves on immune defence, life history traits, and adaptive potential : a snail's perspective

2014

Sostenibilità: una riforma economica che premia l'efficienza

2010

Le democrazie industriali nell’ultimo secolo, hanno improntato lo sviluppo delle proprie società ponendo al centro (e come obbligo) la crescita esponenziale dell’economia. Da più di mezzo secolo la misura di questa crescita è indicata dal Prodotto Interno Lordo (PIL) che “deve” aumentare anno dopo anno per mantenere saldo il rapporto (e il consenso) tra economia, società e cittadini. A partire dalla seconda metà del novecento, questo sistema economico ha distribuito un relativo maggiore benessere solamente ad un quinto degli abitanti del Pianeta, al costo però, di una drastica riduzione delle risorse disponibili e causando il global warming per tutti gli abitanti della Terra. Questo modello…

Sélection des données : entre efficacité et souplesse

2009

The game of developing a game : hobbyist game developers as playful entrepreneurs in the Apple App Store

2015

SparseHC: A Memory-efficient Online Hierarchical Clustering Algorithm

2014

Computing a hierarchical clustering of objects from a pairwise distance matrix is an important algorithmic kernel in computational science. Since the storage of this matrix requires quadratic space with respect to the number of objects, the design of memory-efficient approaches is of high importance to this research area. In this paper, we address this problem by presenting a memory-efficient online hierarchical clustering algorithm called SparseHC. SparseHC scans a sorted and possibly sparse distance matrix chunk-by-chunk. Meanwhile, a dendrogram is built by merging cluster pairs as and when the distance between them is determined to be the smallest among all remaining cluster pairs. The k…

La città nella città: il campus universitario

2010

Temperature measurement in gas mixtures by femtosecond Raman-induced polarization spectroscopy

2003

European Conference on Nonlinear Optical Spectroscopy (ECONOS) MAR 30-APR 01, 2003 BESANCON, FRANCE; The potential of femtosecond Raman-induced polarization spectroscopy (RIPS) for the simultaneous determination of temperature and concentrations was investigated. These measurements were related to the rotational time response of the molecular gas mixture, which was measured as a function of the pump-probe time delay. The change of the polarizability anisotropy with respect to the vibrational levels was taken into account. The results of temperature measurements in pure CO2 showed good agreement with the values obtained by a thermocouple. The RIPS technique was also applied to a CO2-N2 gas m…